gralloc: set supported planes for buffers on allocation

This is done so that we should not have to do it dynamically during
composition. This information will be used later with hwcomposer module
when using planes for composition.

Change-Id: I2b6716fe9a8da81050645900c6c0955385946991
Signed-off-by: Tapani Pälli <tapani.palli@intel.com>
4 files changed